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CVE-2021-44730

Published: 17 February 2022

snapd 2.54.2 did not properly validate the location of the snap-confine binary. A local attacker who can hardlink this binary to another location to cause snap-confine to execute other arbitrary binaries and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1

Priority

High

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
snapd
Launchpad, Ubuntu, Debian
bionic
Released (2.54.3+18.04)
focal
Released (2.54.3+20.04)
hirsute Ignored
(end of life)
impish
Released (2.54.3+21.10.1)
upstream
Released (2.54.3)

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H